docs: add #545 dependency to item #54 for Leiden consistency

Author: carlos-alm

docs/roadmap/BACKLOG.md

@@ -109,7 +109,7 @@ Co-change data captures historical coupling from git history. Currently only use
 | ID | Title | Description | Category | Benefit | Zero-dep | Foundation-aligned | Problem-fit (1-5) | Breaking | Depends on |
 |----|-------|-------------|----------|---------|----------|-------------------|-------------------|----------|------------|
 | 53 | Co-change coupling in triage | Files with high co-change Jaccard scores are maintenance risks — changing one always requires changing the other. Add `coChangeCoupling` as a triage scoring dimension using the max Jaccard score for each file. | Intelligence | Triage surfaces tightly coupled file pairs that static dependency analysis may miss — hidden coupling from shared business logic or implicit contracts | ✓ | ✓ | 4 | No | — |
-| 54 | Co-change communities vs dependency communities | Compare Leiden communities from the dependency graph with clusters from co-change data. Files that co-change frequently but live in different dependency communities indicate hidden coupling or architectural drift. | Architecture | Surfaces coupling that the static graph can't see — two modules may have no import relationship but always change together due to shared assumptions | ✓ | ✓ | 3 | No | — |
+| 54 | Co-change communities vs dependency communities | Compare Leiden communities from the dependency graph with clusters from co-change data. Files that co-change frequently but live in different dependency communities indicate hidden coupling or architectural drift. | Architecture | Surfaces coupling that the static graph can't see — two modules may have no import relationship but always change together due to shared assumptions | ✓ | ✓ | 3 | No | #545 |
 | 55 | Missing co-change partner warning in `check` | When `--staged` changes touch file A but not its historical partner file B (high Jaccard), emit a warning: "file A historically co-changes with file B — did you forget to update it?" | CI | Catches incomplete changes in CI — the most common source of subtle bugs is changing one file in a coupled pair but forgetting the other | ✓ | ✓ | 4 | No | — |
 
 ### Tier 1e.1 — Community leverage (build on vendored Leiden algorithm)